CODEWITHSUNDEEP
makefileicc
ARH
ARH

Reputation: 1395

Set compiler name in the Makefile

I have a Makefile suppose to compile my app in multiple host, some of them has built in intel compiler (icpc) and others just have g++. I would like that makefile automatically detect availability of icpc and if it is available, compile application with intel compiler, otherwise just compile it with g++.

How do I have to change Makefile to automatically detect availability of icpc compiler ?

Here is my try which simply did not work 

ERR = $(shell icpc 2>/dev/null ; echo $? )
ifeq "$(ERR)" "127"
    CXX = g++
else
    CXX = icpc
endif

Upvotes: 3

Views: 2040

Answers (1)

Olaf Dietsche
Olaf Dietsche

Reputation: 74078

You can use which for detecting icpc instead. Also better check against 0 instead of 127, since there may be differences from one system to another

ERR = $(shell which icpc >/dev/null; echo $$?)
ifeq "$(ERR)" "0"
    CXX = icpc
else
    CXX = g++
endif

all:
    echo $(CXX)

Upvotes: 1

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